• Nuclear Engineering and Technology
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• 제47권1호
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• pp.1-10
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• 2015

After the Fukushima Daiichi nuclear power plant (NPP) accident, new regulatory requirements were enforced in July 2013 and a backfit was required for all existing nuclear power plants. It is required to take measures to prevent severe accidents and mitigate their radiological consequences. The Regulatory Standard and Research Department, Secretariat of Nuclear Regulation Authority (S/NRA/R) has been conducting numerical studies and experimental studies on relevant severe accident phenomena and countermeasures. This article highlights fission product (FP) release and hydrogen risk as two major areas. Relevant activities in the S/NRA/R are briefly introduced, as follows: 1. For FP release: Identifying the source terms and leak mechanisms is a key issue from the viewpoint of understanding the progression of accident phenomena and planning effective countermeasures that take into account vulnerabilities of containment under severe accident conditions. To resolve these issues, the activities focus on wet well venting, pool scrubbing, iodine chemistry (in-vessel and ex-vessel), containment failure mode, and treatment of radioactive liquid effluent. 2. For hydrogen risk: because of three incidents of hydrogen explosion in reactor buildings, a comprehensive reinforcement of the hydrogen risk management has been a high priority topic. Therefore, the activities in evaluation methods focus on hydrogen generation, hydrogen distribution, and hydrogen combustion.

• 환경영향평가
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• 제22권4호
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• pp.369-379
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• 2013

Noise and vibration problems at the construction site, expansion of construction scale and frequency of urban construction is increased, has given the damage to local residents. Also, the result of civil complaint about noise and vibration that occurred in 2011 was 56,244; it is showing an increasing trend of more than 4% annually. In particular, the construction noise and vibration, the civil complaints of around construction site accounts for 64.6%(36,353), are harmful to the tranquility of living environment. As a result, the government has managed to strengthen the regulatory standard of construction noise (65dB(A), Day-time) from 2011. However, the regulatory standard of construction noise and vibration does not meet and also complaints related the construction noise and vibration not decreased. Because the management system can be applied to the construction site is insufficient and a shortage of manpower. In this study, investigated the status and problems of the regulatory standards related to construction noise and vibration, we propose an efficient management plan of construction noise and vibration.

• 항공우주시스템공학회지
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• 제6권1호
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• pp.19-25
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• 2012

Nowadays, the demand of civil application of an UAV has been being increased all over the world. And many projects are going on to develop a new regulatory system for an UAV to access a national airspace. Especially, to fly UAV over the non-restricted airspace as a standard airworthiness standard, many authority funded research institutes and associations are studying regulatory environment. For the UAV to access civil airspace, the certification system of the aviation regulation have to allow this. FAA of US, CASA of Australia and European authorities are now issuing an experimental airworthiness certificate to a civil UAV. This is the first step of issuing a standard airworthiness certificate. And many people believe that civil UAV can fly over a NAS if some technical issues are resolved. In this study, I would like to present an international trends of a civil UAV regulation system, reliability trend of unmanned aerial system and would like to bring up a our regulatory environment and suggest an UAV regulatory policy.

• 한국항해항만학회지
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• 제27권1호
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• pp.1-8
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• 2003

본 연구는 우리나라 해운 ㆍ항만 분야에 등록된 341개의 규제를 대상으로 보다 바람직한 규제체계의 방향을 설정하는 것이 목적이다. 이를 위해 이 연구에서는 현재 우리나 해운 ㆍ항만분야의 규제 수준이 OECD가 규정한 규제 3단계 가운데 초기수준인 규제 1단께에 있음을 지적하고, 규제의 복잡성등 OECD(1993)가 제시한 제 8조 규제순응 저하요인을 적용한 2단계 조사기준에 따라 우선순위를 선정하였다. 이 결과에 따르면 314개의 등록규제 가운데 규제순응도 조사가 필요한 28개 규제하였으며, 완화 또는 폐지해야할 규제는 9개, 새로운 규제로 바뀌어야 할 규제는 5개인 것으로 밝혀졌다.

• 한국압력기기공학회 논문집
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• 제7권3호
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• pp.15-22
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• 2011

The chemistry factor and RTPTS margin for domestic reactor pressure vessel materials were analyzed by using the surveillance data which have been obtained from 8 nuclear power plants in Korea. The surveillance data have been used to assess the integrity of the pressure vessel under the pressurized thermal shock (PTS) event. The chemistry factor, which is determined by the Cu and Ni contents of vessel materials, is considered a proper tool to assess the $RT_{PTS}$. The chemistry factors, which were obtained from the surveillance data of domestic reactor pressure vessels, were investigated and compared with those of Regulatory Guide 1.99 in this study. Regressions for ${\Delta}RT_{NDT}$ were performed to expect the chemistry factor as a function of Cu and Ni, and to estimate $RT_{PTS}$ margin. The margin analysis was performed by comparing the regression graphs and standard deviations with those of Regulatory Guide 1.99. The standard deviations calculated by using the domestic surveillance data for base metal and welds are almost same as the standard deviations which are suggested on Regulatory Guide 1.99, Rev.2.

• Journal of the Korean Data and Information Science Society
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• 제22권1호
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• pp.125-136
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• 2011

Ground-level ozone, an air pollutant that is monitored by the Environmental Protection Agency (EPA), damages human health by irritating the respiratory system, reducing lung function, damaging lung cells, and aggravating asthma and other chronic conditions. In March 2008, the EPA strengthened ozone standards by lowering acceptable limits from 84 parts per billion to 75 parts per billion. Here epidemiologic data is used to study the effects of ozone regulation on human health and assessed how various regulatory standards for ozone may affect nonaccidental mortality, including respiratory-related deaths during ozone season. The assessment uses statistical methods based on hierarchical Bayesian models to predict the potential effects of the different regulatory standards. It also analyzes the variability of the results and ho they are impacted by different modeling assumptions. We focused on the technical an statistical approach to assessing relationship between new ozone regulations and mortality while other researches have detailed the relationship between ozone and human mortality. We shows a statistical correlation between ozone regulations and mortality, with lower limits of acceptable ozone linked to a decrease in deaths, and projects that mortality is expected to decrease by reducing ozone regulatory standards.

• Toxicological Research
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• 제17권
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• pp.219-225
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• 2001

The basic structure for assessment of potential health risks from environmental chemicals is widely agreed upon, but many of the details of risk assessment procedures differ among practitioners. Government regulatory agencies typically have guidelines or standard procedures for their risk assessments, established to ensure consistency and comparability, to set standards for adequacy, and to embody underlying tenets. In setting and updating such guidelines, each agency takes into account not only the prevailing thinking about appropriate procedures, but also its own goals and responsibilities and the precedents it has set for itself in past analyses. This results in variations in methods, and consequently in characterization of risks, among regulatory assessments, even when they are based on the same data. As a result, adopting existing assessments from a variety of regulatory bodies needs to be done with caution. This paper examines some of the variants in risk assessment approaches among American federal regulatory agencies and relates them to the variations in regulatory responsibilities of those groups. Comparisons to international practices are also drawn. The impact on development of world-wide risk standards is discussed.

• Nuclear Engineering and Technology
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• 제55권3호
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• pp.870-875
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• 2023

In this paper, we analyzed the revised guidance on electromagnetic (EM) interference qualification of Regulatory Guide 1.180 (Revision 2), which is published by the U.S. Nuclear Regulatory Commission for electromagnetic compatibility qualification for nuclear safety, by comparing it with that of the previous version. We confirmed that the test methods and the acceptance criteria of both CE101 and CE102 tests for conductive emission and RE102 test for radiating emission are changed in the recently revised Regulatory Guide 1.180 (Revision 2). Furthermore, we found that the revised Regulatory Guide 1.180 provides flexibility in the use of alternative methods for EM interference (EMI) qualification, in that a mix of the various base-standards is technically allowed. In addition, the primary revision of the updated Regulatory. Guide 1.180 is that MIL-STD-461G is to be adopted as the latest base-standard, instead of MIL-STD-461E. To evaluate the influence on EMI qualification for nuclear safety due to the endorsement of MIL-STD-461G, we thoroughly analyzed the modifications in the acceptance criteria and test methods for EMI qualification, and then validated the analyzed effect on the EMI qualification, which is caused by the revision of MIL-STD-461, by performing electromagnetic simulation for equipment under RE102 test.

• 한국식품영양과학회지
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• 제29권5호
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• pp.837-842
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• 2000

Commercially distributed salted and fermented anchovy sauces in Korea were purchased from six different companies. Microbiological, chemical, rheological and sensory analyses were carried out to evaluate the quality and safety and to provide basic information of the products. The salinity of every product was lower than of regulatory standard. All samples tested had acceptable in moisture content and pH. However, wide range of amino nitrogen (AN), volatile basic nitrogen(AN), volatile basic nitrogen (VBN), and trimethylamine (TMA) contents were observed. One product among tested had lower level of AN than regulatory standard. Pathogenic microorganisms were also detected from the samples, therefore sanitation procedure will be needed to ensure safety. From the results, AN, VBN, and viscosity were highly correlated to sensory scores, suggesting that these values can utilized as a standard method to evaluate quality of the salted and fermented anchovy sauce.

• 디지털융복합연구
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• 제17권11호
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• pp.163-170
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• 2019

새로운 기술과 산업의 등장으로 통신산업의 융복합화가 가속되면서 규제제도 개편에 대한 논의가 이루어지고 있다. 이러한 가운데 2018년 기업의 수익에 큰 변화를 야기하는 새로운 수익인식기준이 도입되었다. 본 연구는 새로 도입된 한국채택국제회계기준(K-IFRS) 제1115호 '고객과의 계약에서 생긴 수익'의 규제회계제도 적용가능성을 검토하고 통신정책 수립에 시사점을 제공하고자 하였다. 먼저 K-IFRS 제1115호 중 통신사업자의 수익에 영향을 미칠 수 있는 주요내용을 정리하고, 기존의 수익인식기준과 어떠한 차이가 있는가를 분석하였다. 또한 수행의무의 식별, 거래가격산정 및 거래가격의 배분에 대한 사례를 제시하여 새로운 수익인식기준이 통신사업자의 수익에 어떻게 영향을 미치는가를 확인하고 이에 대한 회계처리방법을 제시하였다. 통신사업자의 수익에 가장 큰 변화는 거래가격을 거래가격을 통신서비스와 휴대전화단말기 판매 두 개의 수행의무에 배부하는 것이며 이로 인해 사업자의 통신서비스매출은 일제히 감소할 것으로 예상된다. 본 연구는 새로운 수익인식기준의 도입에 대한 고찰을 통해 통신사업자의 수익의 변화와 회계처리에 대한 이해를 제고하고, 통신정책 수립에 중요한 시사점을 제공한다는데 의의가 있다.